Pfizer Handbook of Microbial Metabolites 202 



H. Raistrick and D. J. Ross, Biochem. J. 50 635 (1952). 

 411 Cyclopolic Acid, CnHioOg, colorless plates, m.p. 147° (dec.)- 



O 

 CH3 ?^"^ COOH CH 



HO I CHO HO 



CH2OH CH2OH I 



Penicillium cyclopium 



J. H. Birkinshaw, H. Raistrick, D. J. Ross and C. E. Stick- 

 ings, Biochem. J. 50 610 (1952). 



412 Ustic Acid, C11H12O7, colorless crystals, m.p. 169° (dec). 



°" COOH 



OCH3 CH-C^H, 



OH O 



Aspergillus ustus, Paecilomyces victoriae, Ustilago zeae 



H. Raistrick and C. E. Stickings, Biochem. }. 48 53 (1951). 

 Yield about 0.5 g. per liter. 



V. C. Vora, /. Sci. Ind. Research (India) 13B 842 (1954). 



Occurred together with dehydroustic acid, 4,5-dihy- 

 droxy-3-methoxyphthalic acid and a fourth compound, 

 C,,Hs05, m.p. 259°; an m-dihydroxyphenol with a carbonyl 

 group and a carboxyl group. 



413 Radicinin,* CjoHioOr,, optically active crystals. 

 Proposed Structure: 



O 

 O^ / 



HO 



CH3 



I C— CH=CH2 



H 



O 



Stemphylium radicinum 



D. D. Clarke and F. F. Nord, Arch. Biochem. and Biophys. 

 59 269-284 (1955). 

 See also entry 871. 



